Friction brake



y 9, 1930. .1. s. THOMPSON 1,771,595

FRICTION BRAKE Filed Dec. 5, 1928 2 Sheets-Sheet l y 1930. J. 5. THOMPSON 1,771,595

35 J5, L E4 54 7 Z6 trated the invention Patented July 129,- 1 930" I UNITED STATES PATENT OFFICE JAIEB S. THOMPSON, OF NEW YORK, N. Y., ASSIGNOR TO AMERICAN BRAKE MATERIALS CORPORATION, OF NEW YORK N. Y., A CORPORATION OF NEW YORK FRICTION BRAKE Application filed December 8, 1988. Serial No. 828,311.

This invention relates to friction brakes and more particularly to means for securing a friction block ona support to be moved into and out of operative engagement with a member to be braked.

The object of the invention is to providenovel and simple means for detachably securing a friction block to its support whereby the block may be readily mounted on the support in operative position and as readily removed for replacement if required.

And another object of the invention is to rovide means whereby a friction block may e easily and securely mounted on its support in a friction brake assembly while the assembly is in service and without requiring any mechanical work or the use of any tools for installing or removing the block.

In the accompanyin drawings I have illusor use in an internal expanding brake assembly and referring thereto:

Fig. 1 shows two blocks mounted on a head or arm, the operating cam being shown in section.

Fig. 2 is a lan view of a portion of Fig. 1 showing the dy of the block partly bro en awa Fig. 3 is'a bottom section of the part shown so in Fig. 2 with the web of the head in section.

Fig. 4 is an enlarged transverse sectional view through the block and head.

Figs. 5-8 are detail sectional views show-.

14 to receive the block and may also havestops 15 at the ends of the seat. The block 13 is provided with a metal back 16 and 1t may have a body 17 of any suitable composition mounted on or embedded in the back which is provided with openings to receive the body material and may have other means whereby the body and the back are securely anchored together. The head is provided with openings 18 and the block is provided with clips which project outward from the back of the block and are adapted to be anchored in said openings for securing the block on the head. These clips may be made 1n different forms and in Fig. 4 I have shown a clip made of one strip of metal bent to form a head 19 with arms 20 extending therefrom and projecting through an opening 16 in the back 16 of the block, the free ends 20' of the arms being turned outward and secured to the back on the inside thereof by rivets 21 or other suitable fastening means. The head 19 is substantially rectangular in shape and yielding anchoring devices 22 are fastened on the head on opposite sides of the 0 enings 18 to be engaged by the head 19 of t e clip. The block will be provided with a plurality of clips, preferab y four, disposed adjacent the -four corners of the block, and the head will be provided with openings 18 properly disposed to receive the clips. \Vhen the block is mounted on the head the clips will be projected through the openin s 18 into engagement with the anchoring devices 22 and then pressure will be applied to the block to force the heads 19 of the clips into anchoring engagement with said devices. The clips may be made of metal which will yield more or less while they are being engaged with the anchoring de- 30 vices to facilitate the operation. To remove the block suflicient force is applied to the block to pull the clips away from the anchoring devices and for this purpose it may be convenient to use some tool as a pr between the block and the head or to asslst in disengaging the clips from the anchoring devices. The construction shown in Fig. 515 substantially the same as that shown in Fig.4 except that-the clip 23 is made solid. The

. anchoring device 22 is employed. In

he same as that of ig. 4 except that oniy one ig. 7 the clip is made in twoparts 24with angular end portions 24' adapted to engage the edge of the opening 18 at the outer end thereof, this edge being preferably beveled at 25 to facilitate the engagement and disengagement of the two parts of the clip therewith. In

Fig. ,8 the clip is also made in two parts 26 with their outer ends 26' turned outward to make anchoring engagement with the head. The inner end of the openin 18 is provided with a countersink 27 to facl itate the movement of the ends 26' into the opening 18 when the block is applied to the head.

My invention provides. a simple means whereby a friction block maylbe engaged with its support and securely eld in position thereon for service and whereby the block may be readily disengaged from the support for replacement. The construction is such that the installation and removal of the block may be accomplished without involvin any mechanical work and without the use 0 any tools because it is possible to release the clips from the anchoring means by hand although it may be found convenient at times to use a tool or something of the kind to facilitate thls operation. The invention is important because it enables the replacement of a worn block uickly and without requiring the facilities 0 a machine or other shop an also without taking the vehicle out of service for more than a ver limited period.

I have s own the invention as it may be used in connection with an internal ex anding brake assembly, and in several di erent forms, but the invention ma a-lso'be used in an external contractin bra e and in brake assemblies of many di erent kinds and I reserve the right to make all such changes as may be requiredor may be desirable in adapting the invention for different installations within the scope of the following claims.

I claim:

1. A friction brake com rising a brake head having an o ening t erein, a brake block seated on the ead, a cli secured to the block and projecting outwar from the back thereof and throughv said opening in the head, and means on the back of the head for detachably anchorin the clip to the head.

2. A friction bra e com rising a brake head havin an opening t erein, a brake block seate on the head, a yielding clip secured to the block and re ecting outward from the back thereof an through said 0 ning in the head, and means on the back 0 the fieag for detachably anchoring the clip to the ea a ' 3. A friction brake comprising a brake head havin an openin therein, a brake block seat on ,the hea a clip made of a metal strip bent upon itself to form a head block seate with arms projecting therefrom, said arms being. secured to the block and pro'ectin outward from the back thereof and t roug said opening in the brake head, and means on the brake head for engaging the clip head for detachably anchoring the clip to the brake head. I

4. A friction brake com rising a brake head havin 7 an openin t erein, a brake on the hea a clip secured to the block and projecting outward from the back thereof and through said opening in the head, and yieldin means on the head for anchorin the cli t ereto.

5. A friction bra e com rising a brake head havi an openin t erein, a brake block seate on the hea a clip secured to the block and projecting outward from the back thereof and through said opening in the head, and oppositely disposed anchoring devices on the head engaging the clip.

6. A friction brake com rising a brake head having an openin block seated on the hea a clip secured to the block andprojecting outward from the back thereof and through said opening in the head, and oppositely disposed yielding means on the head for engaging and anchorin the cli A friction brake com rising a brake head havin an openin t erein, a brake block seate on the hea a clip secured to the block and projecting outward from the back thereof and through said opening in the head, said clip having a head at its outer end, and anchoring means on the head for engagin the head of the clip.

8. A riction brake comprising a brake head having an openin therein, a brake block having a metal bac and seated on the head, a clip secured to said metal back and 'pro'ecting outward therefrom and through sai opening in the head, and means for detachably anchoring the clip to the head.

9. A friction brake com rising a brake head having an openin t erein, a brake block having a metal bac and seated on the head, said metal back having an openin therein, a clip secured to the metal back an projecting through the opening therein and the o ning in the head, and means for detacha ly anchoring the clip to the head.

10. A friction brake com rising a brake head havin an opening t erein, a brake block seate on the brake head, a yielding clip secured to the block and projecting outward from the back thereof and through the opening in the brake head, said clip having a head at its outer end, and yielding means on the brake head for engagin the clip head to anchor the clip to the bra 0 head. i

11. A friction brake comprising a brake head having an o enin therein, a brake t erein, a brake I block. seated on the. rake ead, a chp secured the back thereof and'through said open in the brake head, a cli secured to the blo dfi and projecting outwar from the back thereof and through said ogening in the brake head, said clip having a ead at its outer end, and means on the brake head for engaging the clip head to anchor the clip to the brake head, the clip and anchoring means being engageable and disengageable with a yielding snap action.

JAMES S. THOMPSON. 

